Figure 13: (left) Mesial drift is a well-established phenomenon that may occur over time. It can be slow or rapid. Use of a space-maintaining appliance will prevent this from occurringbetween the time of extraction and implant restoration. Figure 14: (right) Excess cement, which is left behind in the sulcus around a dental implant (between the two implants), results in an inflammatory response leading to bone loss. This is referred to as “cement sepsis”.